How to change default desktop lock screen

[Alpha-Breeze]

I love the HIVEMIND UI but I hate that I cannot get into any settings from desktop to change the desktop lock/login screen to a picture I like (Alienware artwork) There is no settings on the desktop side under ALPHA CONSOLE to change this. Whenever I go back to desktop mode I'm greeted with an ugly windows DEFAULT background wallpaper' I choose my PC name and get to desktop. HOWEVER I can change wallpaper and lock screen with my PC user (ALIENWARE ARTWORK) looks cool. I log out welcomed with my artwork image to select ALPHA CONSOLE MODE. But.... when I leave console to go to desktop again I see the UGLY windows 10 lock screen picture.
The reason is
MICHAEL (my PC name)
and ALPHA CONSOLE(Hivemind UI)

both ARE user accounts (which I think is stupid) BUT..... I really wouldn't mind if I CAN GET INTO THE ALPHA CONSOLE account through windows and CHANGE MY LOG IN LOCK SCREEN BACKGROUND IMAGE! HOW DO I DO THIS????

There use to be a software you could download called lock screen customizer that I could pick ANY background lock screen sign in screen background and it would APPLY to the ALPHA CONSOLE windows account as well. HOWEVER Windows 10 64 bit latest version WILL not run that program. So how do I do this?